Ore-concentrating machine



(No Model 3 Sheets-Sheet 1.

' A. FRASER.

ORE OONOENTRATING MACHINE.

No. 487,261. Patented Dec. .6', 1892.

4 W 2112788888: I hygnior:

(No Model.) 3 Sheets-Sheet 2.

A. FRASER;

ORE OONGENTRATING MAGHINEi I No. 487,261. Patented Dec. v6, 1892.

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Patented Dec. 6-, 1892.

' Witnessesrrn ATENT rrrcn.

ORE-CONCENTRATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 487,261, dated December6, 1892.

Application filed December 30, 1891. Serial 110.416.588. (No model.)

To all whom it 772mg concern:

Be it known that 1, ANDREW FRASER, a citizen of the United States,residing in the city and county of San Francisco, State of California,have invented certain new and useful Im provements in Ore-ConcentratingMachines;

and I hereby declare the following specifiecation and the drawingsaccompanying and forming a part of the same to be a full and to exactdescription of my improvements.

My invention relates to that class of machines known as concentrators orvanners for selecting or concentrating minerals from crushed ore, sand,or other earthy mat- I 5 ter by means of agitation while the material issuspended in or saturated with water; and it consists in theconstruction, arrangement, and combination of parts, substantially aswill be hereinafter described and claimed.

Referring to the drawings, Figure 1 is a plan view of a machineconstructed according to my invention, with some of the details removed.Fig. 2 is a side elevation of the same machine. Fig. 3 is an end view ofFigs. 1 and 2. Figs. l, 5, and 6 are details showing the manner ofconstructing the pivotal supports for theapron and its connected parts.

Similar letters of reference are employed on the different figures toindicate corresponding 0 parts of the machine.

In notation, A A A represent the timber framing or foundation on whichthe machine rests.

Bis the apron or continuous web on which concentration is performed.

C is the main or driving drum, around which the apron passes.

G is the idle-drum, over which the apron passes at the rear of themachine.

0 C are intermediate supporting-rollers that sustain the apron and turnup the edges to form flanges.

C are deflecting-rollers beneath the apron to lift it clear of themachinery.

5 D D are pivoted supports, on which the apron and its supporting-frameare mounted.

E is the crank-shaft for producing an oscillating movement of the apronand its connected parts.

E E are the cranks at each end of the main driving-shaft.

E is the intermediate shaft set at the axis of the aprons oscillatingmovement.

F F are links or connecting-rods for operating the apron and itssupporting-frame. G is a gear-wheel driving the main drum 0'. H is aworm or tangent wheel imparting motion to the wheel G.

H is the shaft and axis of the worm-wheel H.

H H are driving-bands operating the feed motion of the apron.

I is the main drivingpulley for applying power to the machine.

J is a tank, into which the concentrates are discharged from the apronB.

K is a distributing-box, from which material is fed to the apron B.

L are Water-pipes for supplying the apron B.

I. are cooks for regulating the amount of water supplied to the apron.7c

M are the bearings of the crank-shaft E.

N is a coupling connecting the two parts of the shaft E.

O O are conical drums regulating the rate of lineal movement of theapron B.

P is a pedestal for receiving the pivotal supports D D Q Q arechannel-bars forming the sides of the main frame of the apron B and itsdetails.

R is one of the brackets on which the rear drum C is mounted.

S is one of the adj Listing-screws for moving the drum 0 T is the rearend of the apron, where the waste material is discharged.

U is a hand-wheel for shifting the band H and regulating the speed ofthe apron 18.

V is a stop-cock controlling the supply of water to the apron B.

W is a hose-pipe for conveying water to the tank J.

X is the bearing of the pivotal shaft E.

Y Y Y are detents to keep the bracket or support D central on thefoot-step I.

Z is the nipple for connecting hose-pipe. I

w is the hose-pipe to collecting-tank J. a is the screw-joint in theconnecting-links. e is the conical extension on rollers 0 m is theconvex face of the pivotal supports D.

8 represents brackets to. support drums fO In that class ofconcentratingunachines to which my invention belongs the continuousaprons, in addition to their lineal or feed movement, require agitationby lateral, circular, or oscillating motion, or combinations of these;but of Whatever kind, this agitating movement has hitherto been producedso as to react upon the framing of the machine, and, usually, at or nearthe top, causing destructive vibration and consequent wear of the parts.To obviate this objectioml dispense altogether with the usual main frameand mount the apron B and its connected parts upon two or moresupporting-brackets D D which are pivoted and rest upon the pedestals P,set upon the foundation.

To avoid the effects of the agitating movement, which is in this case arocking or oscillatingone, I place the crank-shaft E inbearings M,M,also set upon the foundation, and arrange the connecting-links F F inanearlyvertical position, thus changing the line of force and reactionof the apron B audits parts from a horizontal to a vertical plane and tothe foundation A. The movement of the apron and its frame Q, beingportions of a revolution around the axis at E and the connecting-rods Fand F being tangential thereto there is no vibrations or strains in ahorizontal direction to cause wear or derangement.

The crankshaft E has a main driving-pulley I and a truncated cone-pulley0, also cranks E and F. at its ends. For convenience in erecting and toprovide for placingand removing the pulleys I and O, I make the shaft Ein two pieces and join them by a coupling N. To adjust the apron B andframe Qand keep the working surface level when in a neutral or centralposition, I provide joints or a in the connecting-links F and F so theapron B can be readily adjusted and kept in a proper position byshortening or extending these links and without other adjustment of anykind. The apron B is made of any flexible material, either fibrous or ofgum, and is strained so as to lie Hat by means of the pulley or drum Gwhich can be adjusted forward orback by means of the movable brackets Rand the screws S, as shown in Fig. 2.

To perform the feed or lineal movement of the apron B, motion is takenfrom the conical drum 0' by the band H to the second conical drum 0 onthe shaft E and then by another band H from the shaft E to the shaft Has shown in Fig. 3. This shaft H is pro- 7 vided. with a worm or tangentscrew I-I', gearing into the wheel G, which drives the drum 0 and theapron B at a slow rate, which can be varied by shifting the band H onthe conical drums O and 0 This adjustment is made by means of a commonshifting-fork, operated by a screw and the hand-wheel U. (Shown in Fig.3.)

The ore or material to be concentrated is fed from the distributing-boxW and falls on the apron B in a thin stratum across its width and istaken ,up and moved toward the rear end of the machine bytheaction ofthe water escaping at the cocks L falling on the apron and flowingtoward the lowest end at T. The concentrates or particles of mineralmatter being heavier than the sand or earthy matter settle at thebottom, adhere to the apron, and are carried back and around the drum 0to fall or be washed off at the tank J.

The material on the apron B is prevented from spilling over the sides bya flange orlip turned up by the conical extensions e e of thebearing-rolls 0 as shown in Fig.1. This raised lip or flange becomesfiat again as the apron B approaches the drum 0. The gangue or wastematerial falls off the apron B as it passes over the rear drum C Thedeflection of the apron B bythe drums or rollers O is to raise thebottom part clear of the machinery and parts beneath and preventsvibration of the Web, which mightotherwise take place. The drums C aremounted on pivoted brackets S, adjusted bythescrews 0, so that the lowerreach of the apron maybe set up or down accordingly.

' \Vater is introduced through pipes L, and in the horizontal sectionabove the table Iin sert a number of adjustablecocks L which .can be setto distribute the water uniformly over the surface of the apron B, or anincreased amount can be supplied at the sides or in the center, thesupply as a Whole being controlled by a valve Vin the usual manner.

The hose-pipe Wis connected from the'water-supply to thebottom-of thetank J to provide water required there.

Referring to Figs. 4, 5, and 6 these represent one of the pivotalbrackets or supports on which the apron B and its frame are mount- .edand the manner of constructing the foot step at the bottom.

In the partial end view, Fig.4, the pieces Y Y Y are detents to retainthe bracket or support D in a central position over the pedestal P. Thetop of the pedestal P is flatand the bearing of the bracket restingthereon is curved and also indented, as .shown at m in the section, Fig.5, so as to form protecting lips or flanges n all around the bearingandprotect it from grit and sand.

The bearing X for the shaft E is formed integrally with the bracket orsupport D, as shown in the section, Fig. 6. This bracket D, as may beseen, is made to span the main frame of the apron B and to receive .ateach side the channel-bars Q, which are the. main members of this frame.

Having thus described the naturetand objects of my invention, also themanner of constructing and applying the same what I claim as new, anddesire to secure by Letters Patent, 1s-

1. In an ore-concentrating machine as herein described, an oscillatingframe having v a rocking motion on rolling faces, as herein described,placed at or near the plane in which the actuating-cranks are situatedand at the base of the machine, so that the, action of the cranks willbe transverse to the rolling supporting-faces and in a vertical ornearly-Ver tical plane and so the momentum of the vibrating table andits attachments will fall vertically on the foundation-frame,in themanner substantially as and for the purposes specified and set forth.

2. In an ore-concentrating machine, an endless apron andsupporting-frame for the same having a rocking or oscillating movement,as herein described, mounted on pivotal rolling supports on thefoundation-frame, and a crank-shaft to actuate the apron, also set onthe foundation-frame and connected to the apron-frame by links, whichcan be lengthened or shortened, so that the upper or working surface ofthe apron can be set by such adjustment and the ore be equallydistributed thereon, in the manner substantially as and for the purposesspecified.

3. In an ore-concentrating machine having an oscillating movement, asherein described, rolling supports for the same placed at or on thefoundation-frame, branched supporting standards resting on therolling-faces and extending to the outer rails of the apron-supportin gframe, so as to dispense with framing other than the foundation, in themanner and for the purposes herein set forth and described.

4:. In an ore-concentrating machine, an oscillating apron-supportingframe supported on branched standards provided with rolling bearings seton the foundation-frame, an actuating crank-shaft set at the side of themachine also on the foundation-frame, the shaft divided into two coupledparts, and a driving-pulley placed between its bearings, and the cranksoverhung at each end, so that they can be made solid with the shafts andthe con- 40 nections conveniently removed without disturbing thedriving-gearing, substantially in the manner and for the purposespecified.

5. In an ore-concentrating machine, an oscillating apron-supportingframe with an end- 5 less apron thereon, the frame mounted onstandardssupported onrollingbearingsplaced on the foundation-frame, andan intermediate feeding-shaft mounted in the support ing-standards nearthe center of their oscillation and connected to the main or crank shaftby means of a belt and conical drums also to the driving-apron drum bytangent gearing, in the manner substantially as and for the purposes setforth.

In testimony whereof I have hereunto atfixed my signature in thepresence of two witnesses.

ANDREW FRASER.

Witnesses:

ALFRED A. ENQUIST, WILSON D. BENT, Jr.

